Narrow-bandwidth equalization causes audible ringing in both boost and cut modes.

Evidence

Because a filter is required in an equalizer the latter also has the same time domain effects that filters have, as discussed earlier. This is particu­ larly noticeable when narrow-bandwidth equalization is used, as the associ­ ated filter can “ring,” as shown in Figures 1.62 and 1.63, for a considerable length of time in both boost and cut modes. — David Howard, Jamie Angus, coustics and Psychoacoustics, 2405

Categorization

• QUESTION: How long does narrow-band filter ringing actually last, and can it be heard as a distinct pitch or as smearing? Figures 1.62-1.63 aren’t reproduced here.